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1 Picture, What Can You See ? |
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painter777 
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Joined: Feb 18 2016 Location: Central MI Status: Offline Points: 2352 |
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 Topic: 1 Picture, What Can You See ?Posted: Jan 25 2025 at 2:48pm |
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This 1 picture was posted on another forum with the OP asking about what the Logo on the Carbine stood for. There were many replies, with most saying they looked like Swedish Proof Marks. Seeing the 'Skull Face' I think it's the Cologne, Germany Proof House (since 68) with the 00 being the year 2000. I couldn't make out the 1st symbol. But the 'Logo' is the least of my concerns. Does anyone see what I'm seeing? I'm sure you will, but I'm amazed so many replied and never mentioned this key thing.
Once you see it, Tell me how this happens?
Ch-P777  |
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Living Free because of those that serve.....
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W5USMC
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Joined: Apr 29 2017 Location: Missouri Status: Offline Points: 3640 |
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Posted: Jan 25 2025 at 3:06pm |
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Missing 1/2 of the left bolt lug, not sure how that would happen.
Wish there was a clearer picture of the markings, thinking the 1st one may be the Nitro proof, also might be a Nitro on top of the bolt.
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Wayne
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painter777
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Posted: Jan 25 2025 at 3:22pm |
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Wayne,
Knew you'd see it. Was shocked how many didn't. Look how much finish loss and signs of rubbing above the 1/2 Lug. Carbine is a NPM 4,288,xxx and in Germany as is the OP. I couldn't get replies, just tried to warn him to have it Inspected. I still fear N14 Bolts  Thx Ch-P777
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Living Free because of those that serve.....
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floydthecat
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Posted: Jan 25 2025 at 4:53pm |
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I’d be willing to suggest it won’t bother a thing….if that’s all it’s missing.
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floydthecat
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Posted: Jan 26 2025 at 11:16am |
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I certainly didn’t design the action but I think in the real world and on the drawings, the left and right lugs are suppose to contact their respective rear receiver recesses on lock up. If one pays close attention that is usually not the case especially on a well fired carbine. About all the left lug does is guide the bolt as it retracts.
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Jond41403
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Posted: Jan 26 2025 at 11:53am |
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I agree with Floyd, and Floyd would know if any of us would about that left lug. But Floyd is right, there's really no stresses applied to the left. All the stress to my knowledge is always applied to the right lug. I would fire it but I'm from Tennessee, we are known for taking chances haha. I very seriously doubt the left lug is halved by cracking, for some unknown reason I bet that was cut off by the user. The only guess I can make is maybe he tried to fit that bolt to another firearm at one time and that left lug was all that was preventing him from fitting it, who knows. Maybe the previous owner was a tinkerer like Floyd
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floydthecat
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Posted: Jan 26 2025 at 3:03pm |
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I don’t cut my lugs…..mostly just break them.😁
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jackp1028
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Posted: Jan 26 2025 at 3:22pm |
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FWIW, the Ordnance drawings for the receiver and the bolt will allow a minimum zero clearance (maximum material condition) to a maximum .007" clearance (minimum material condition) between the left lug mating surface and the receiver when the right lug has is in full contact with the receiver. I guess that means most of the time the right lug will contact the receiver first. I have confirmed this with a feeler gauge. I have measured an average of .0025" clearance on a sample of several carbines in my collection. If the right lug/receiver surface wears, maybe the left lug will eventually start making contact. Also, any looseness that would allow the bolt to tilt might allow the left lug to make equal contact with the receiver. Based on this, I would conclude the primary purpose of the left lug is to provide a means to guide the bolt rearward in the receiver channel. Shortening this lug might compromise its ability to reliably do this job due to the smaller bearing surface and possible increased wear potential. However, I think this is an unlikely outcome.
I agree with Floyd and Jon that there is little possibility of a negative outcome as long as there is nothing else that we can't see. Edited by jackp1028 - Jan 26 2025 at 3:49pm |
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JackP
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painter777
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Posted: Jan 26 2025 at 6:32pm |
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I'd pay to look at it in person.
Interested if the missing part is cut cleanly off the bolt. It looks to be a 90 degree cut on whats left. Also like to see the left locking shoulder on the receiver. Maybe cut away because it was bumping on a bent skirt on a receiver? IDK I just don't know why you'd remove it? Ch-P777
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